Oak Chips/Cubes/etc... in the context of Mead, but very relevant for anyone looking to use oak in brewing. Written by some guy named "Oskaar" who is an admin for GotMead.com ... hope that isn't too spammy.
BrewersSupplyGroup.com (a division of Rahr) has lots of information about hop types, hop substitutions, malt types, yeast, crop outlooks etc. fun to look at all the info. they put out for the craft market.